400409850 has 48 divisors (see below), whose sum is σ = 1001846592. Its totient is φ = 105826560.

The previous prime is 400409839. The next prime is 400409869. The reversal of 400409850 is 58904004.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5139 + ... + 28761.

It is an arithmetic number, because the mean of its divisors is an integer number (20871804).

Almost surely, 2^400409850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400409850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (500923296).

400409850 is an abundant number, since it is smaller than the sum of its proper divisors (601436742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400409850 is a wasteful number, since it uses less digits than its factorization.

400409850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23751 (or 23746 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 400409850 is about 20010.2436267028. The cubic root of 400409850 is about 737.0578638796.

The spelling of 400409850 in words is "four hundred million, four hundred nine thousand, eight hundred fifty".